1. Subjects must have the following laboratory values: Hematocrit ≥ 35%, serum creatinine ≤ 1.5 mg/dl, aspartate aminotransferase (AST) < 2 X upper limit of normal, Alanine aminotransferase (ALT) < 2 X upper limit of normal, alkaline phosphatase < 2 X upper limit of normal, normal urinalysis [no glucose, trace protein, trace ketones, lipase < 50 IU/L, no bacteria, up to 1-3 white blood cells (WBC) and red blood cells (RBC) per hpf], and normal platelets, prothrombin time (PT) and partial thromboplastin time (PTT).